Until recently, LCD was the only technology used for digital camera displays. This is beginning to changes with the emergence of Organic Light Emitting Diode (OLED) technogy. OLED offers a series of advantages over LCDs, particularly for photographers. Whether it's the display panels on the back of the Olympus PEN E-P3 or the microdisplays used as electronic viewfinders in Sony's SLT-A77, OLED is starting to make an impact on the camera market. Ron Mertens, editor-in-chief of OLED-Info, explains some of the advantages and disadvantages of this type of display, and gives an insight into some of the latest developments in this emerging field.